The US + Canada territory is really huge, but every time I look up information about battles against Indians, there are a few hundred Indian warriors at most. It leaves me with the impression that American Indian population was really small at that time.
Have we been able too estimate the number of the people who lived in North America before Europeans came?
There is always plenty of room for further discussion, but here is a previous thread on population size in the Americas before contact, complete with my personal rant/warning on the complexities and issues with constructing pre-Columbian population estimates.